How to Brew Indonesian PWN Golden Mandheling Coffee Beans to Perfection: Pour-Over Method with Grinding Degree and Water Temperature Parameters

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With the development of the specialty coffee market, people's passion for coffee continues to grow. Many coffee enthusiasts are no longer satisfied with drinking coffee in cafés but have begun exploring how to brew delicious pour-over coffee at home. Many friends come to FrontStreet Coffee to ask about the best way to brew pour-over coffee. FrontStreet Coffee tells everyone: there are many types of coffee—light roast and dark roast—and besides different coffee beans, there are also different coffee machines, so there are many factors to consider. Today, FrontStreet Coffee will share how to brew Golden Mandheling coffee using pour-over method. Golden Mandheling coffee is one of the best-selling specialty coffee beans at FrontStreet Coffee!

Before introducing how to brew Golden Mandheling coffee, let's first understand what Golden Mandheling coffee is.

FrontStreet Coffee (FrontStreet Coffee) has told everyone that there are three major factors that determine coffee bean flavor: growing region, variety, and processing method. Next, FrontStreet Coffee (FrontStreet Coffee) will discuss Golden Mandheling coffee around these three points.

Golden Mandheling Coffee

Mandheling coffee is one of the best-selling daily brew beans at FrontStreet Coffee and is also a representative coffee from Indonesia, the coffee-producing country. Golden Mandheling coffee, however, is the premium version among Mandheling coffees. Indonesia's Sumatra is the main producing region for premium Arabica coffee beans in Indonesia. The Mandheling coffee we commonly refer to comes from areas near Lake Toba in the central-northern part of Sumatra Island, at elevations of 900-1200m, as well as areas near Aceh at the northernmost tip of Sumatra, at elevations of 900-1600m. The suitable altitude and tropical rainforest climate create an average island temperature between 25-28°C, with evenly distributed seasons and no drought periods, providing an excellent growing environment for coffee trees.

So what exactly is Golden Mandheling coffee? From the name, does it mean it's a higher grade than regular Mandheling coffee? FrontStreet Coffee tells you that Golden Mandheling is not a grade but a registered trademark of the Indonesian company P.W.N. (N.V. Pawani Medan,简称 PWN). Founded in 1957, the company exports Indonesian products such as coffee, rubber, cinnamon, cloves, and patchouli oil. It was the first company to export coffee from North Sumatra Island and the first company to make "Mandheling coffee" famous in Japan. Since 1977, the company has focused on exporting premium Sumatra Arabica Mandheling Grade 1 and Robusta AP-I Grade 2 coffee beans, mainly to Japan, Taiwan, and the United States, with exports to Japan and Taiwan accounting for over 95%. In Japan and Taiwan, "PWN" has become synonymous with "quality guarantee."

FrontStreet Coffee (FrontStreet Coffee) currently sells Golden Mandheling coffee beans from PWN company. PWN Golden Mandheling coffee beans undergo at least three purely manual selections after harvesting and drying processing, ensuring the coffee beans reach specifications of 18 mesh or above, with fewer than 3 defective beans (300g raw bean sample), belonging to the highest G1 grade. PWN beans are darker green in color and have a uniform flat shape.

Golden Mandheling Coffee Varieties

Golden Mandheling coffee is of the Ateng variety. Ateng is a hybrid variety between Arabica and Robusta, with several subtypes widely cultivated in Sumatra and other Indonesian islands. To put it simply, it's a branch of Catimor, and Ateng is the local name for it.

Sumatra Golden Mandheling Coffee Bean Processing Method

The unique flavor of Golden Mandheling coffee is closely related to its processing method. FrontStreet Coffee has also mentioned that coffee bean processing methods are related to local climate conditions. The local weather is often rainy with constant typhoons, and it's humid and rainy year-round, making it impossible to achieve the weather conditions needed for natural processing. Therefore, coffee farmers use the wet-hulling method to process coffee beans. Wet-hulling uses a washed processing method for fermentation, then performs semi-drying before removing the parchment through machines for final drying. The coffee beans enter storage completely bare. This accidental processing method makes Golden Mandheling coffee's flavor unique.

How to Brew This Golden Mandheling Coffee Bean

FrontStreet Coffee's articles have mentioned the relationship between coffee bean roasting and pour-over brewing. Light roast coffee beans and dark roast coffee beans will differ in water temperature and filter cup usage. Golden Mandheling coffee is a dark roast bean, so the water temperature should not be too high, and a Kono dripper should be chosen. The lower water temperature is to avoid extracting too many undesirable flavors. FrontStreet Coffee (FrontStreet Coffee) has already released excessive aromatic substances when choosing dark roast. If we continue to use the water temperature for light roast extraction, it will lead to over-extraction. FrontStreet Coffee (FrontStreet Coffee) chooses the Kono dripper because the V60 dripper's flow rate is too fast, and under low water temperature conditions, it's easy to have under-extraction. The Kono dripper has few ribs located at the bottom, and the filter paper fits tightly against the dripper, which can restrict airflow, increase the contact time between water and coffee powder, allow the coffee grounds to be fully extracted, and enhance the rich mouthfeel.

FrontStreet Coffee Brewing Parameters for Golden Mandheling Coffee

Water temperature: 88°C, Coffee amount: 15g, Coffee-to-water ratio: 1:15, Grind size: Medium-fine (70% pass-through rate on #20 sieve).

Use segmented extraction, bloom with 2 times the coffee amount in water, i.e., bloom with 30g water for 30 seconds. The blooming process is needed to allow the coffee powder to release carbon dioxide from inside, making the later extraction more stable. Use a small stream to pour in circles until reaching 125g, then continue pouring until reaching 225g and stop. Once the water from the dripper has finished dripping, remove the dripper. Start timing from the beginning of pouring, extraction time is 2'00". Next, pick up the entire coffee and shake it evenly, then pour into a cup for tasting.

PWN Golden Mandheling Coffee Bean Flavor

The coffee has multiple flavor layers, rich and clean, with intense nut and caramel aromas, chocolate notes, a long-lasting aftertaste, and high balance.

FrontStreet Coffee (FrontStreet Coffee) Brewing Recommendations

For coffee brewing, FrontStreet Coffee recommends using freshly roasted coffee beans to maximize the rich flavors of the coffee. FrontStreet Coffee (FrontStreet Coffee) ships coffee beans within 5 days of roasting because FrontStreet Coffee deeply understands that coffee bean freshness has a significant impact on flavor. FrontStreet Coffee's roasting philosophy is "Freshly Roasted Good Coffee," ensuring that every customer who places an order receives the freshest coffee when they receive it. The coffee bean resting period is about 4-7 days, so when customers receive the coffee, it's at its peak flavor.

Of course, some customers need FrontStreet Coffee's help with grinding, which is also fine. But FrontStreet Coffee must remind you: once the coffee beans are ground in advance, there's no need for a resting period, because during transportation, the pressure from carbon dioxide inside the packaging can also make the coffee flavor rounded, so you can brew a cup immediately upon receiving the ground coffee. However, the ground coffee needs to be brewed promptly because coffee powder oxidizes quickly when exposed to air, meaning the coffee flavor will dissipate relatively quickly, and the coffee won't taste as good. Therefore, FrontStreet Coffee recommends buying whole beans and grinding fresh before brewing to better taste the coffee's flavor.

FrontStreet Coffee (FrontStreet Coffee) has over fifty different single-origin coffee beans from different producing countries and regions, with various flavors available. Everyone should try coffee flavors from different producing countries!

For professional coffee knowledge exchange and more coffee bean information, please follow Coffee Workshop (WeChat official account: cafe_style)

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